Holds a degree in Chemistry (2014) from the Federal University of Santa Maria (UFSM), including an academic exchange under the CNPq SWG program at the University of Oviedo (Spain). Also holds a Bachelor's degree in Industrial Chemistry and a Master's degree in Organic Chemistry (from UFSM). Earned a Ph.D. in Biochemistry (UFSM, 2020), with a sandwich period at the University of Padua (Italy) through the Institutional Internationalization Program (PrInt/CAPES).
RESEARCH, TEACHING, or OTHER INTERESTS
Biochemistry, Chemistry, Education, Physical and Theoretical Chemistry
Promising Flavonoid-Fused Aminoquinolines as Synthetic Alzheimer's Disease Models: Design, Synthesis, Anticholinesterase Activity, ADMET and Molecular Docking Inaiá O. Rocha, Cássia P. Delgado, Pablo A. Nogara, João B. T. Rocha, Marcos A. P. Martins, Nilo Zanatta, Helio G. Bonacorso Chembiochem, 2026 An efficient one‐pot, two‐step [4 + 2] cyclocondensation reaction of (±)‐2‐phenylchroman‐4‐ones ( 1 ) with various scaffolds of 2‐aminobenzonitriles ( 2 ) was employed using AlCl 3 as the catalyst in the presence of toluene as a solvent under conventional thermal heating. This method was used to synthesize a series of six novel examples of (±)‐7‐amino‐6‐aryl‐6 H ‐chromeno[4,3‐ b ]quinolines ( 3 ), which were designed as potential cholinesterase inhibitors. Subsequently, the new chromeno[4,3‐ b ]quinolines were evaluated for their AChE and BChE inhibitory activity and subjected to molecular docking studies. In vitro cholinesterase assays and in silico docking demonstrated that all newly modified tacrine analogs 3 exhibited higher Hs BChE inhibitory activity compared to Hs AChE. Specifically, the most effective human cholinesterase inhibitor was the compound (±)‐7‐amino‐6‐phenyl‐6 H ‐chromeno[4,3‐ b ]quinoline ( 3aa ), with an IC 50 of 2.73 μM for Hs AChE and 0.096 μM for Hs BChE. These findings suggest that compound 3aa is a promising candidate for further assessment in synthetic Alzheimer's disease models.
Molecular Aspects of Methylcadmium Toxicity: Effects on the H2O2Reduction by Cysteine and Selenocysteine Disclosed In Silico Alessandro Rubbi, Francesco Lambertini, Pablo A. Nogara, Marco Bortoli, João B. T. Rocha, Laura Orian Chemical Research in Toxicology, 2026 High Resolution Image Download MS PowerPoint Slide Cadmium (Cd), like the other group 12 elements (Zn and Hg), has a high affinity for sulfur (S) and selenium (Se), a property that strongly influences its adverse biological effects. Although the symptoms of Cd toxicity are diverse, a common denominator is found in oxidative stress, resulting in the disruption of redox balance in cells and the proliferation of reactive oxygen species (ROS) and harmful radicals. Methylcadmium (CH 3 Cd + ) is a convenient model to study Cd pro-oxidant activity in silico. In this work, the effect of CH 3 Cd + on the peroxy-reducing potential of cysteine (Cys) and selenocysteine (Sec) is investigated at the ZORA-BLYP-D3(BJ)/TZ2P level and compared to our current knowledge on the analogous molecular aspects of methylmercury’s toxicity (CH 3 Hg + ). Molecular docking simulations indicate that CH 3 Cd + binds favorably to the catalytic sites of the GPx1 and TrxR1 enzymes. The short distances between the metal and Sec suggest that a nucleophilic attack by Se to Cd leading to the inhibition of the enzyme is indeed possible. Methylcadmium pro-oxidant activity is─if not equal─only slightly inferior to that of methylmercury.
Stereochemical Modulation of Palladacyclopentadienyl Complexes Bearing Diphosphine Ligands: A Key to Enhanced DNA Interaction and Anticancer Activity Stefania Mautone, Martina Scianna, Isabella Caligiuri, Laura Orian, Pablo Nogara, Nicola Demitri, Flavio Rizzolio, Thomas Scattolin European Journal of Inorganic Chemistry, 2026 Palladacyclopentadienyl complexes represent a uniquely stable and structurally rigid class of organopalladium compounds with significant potential for anticancer drug development. Here, we report the first systematic exploration of palladacyclopentadienyl complexes supported by a diverse set of achiral and chiral diphosphine ligands, including DPPF, DPPE, DPPP, DPPBz, DPEPhos, Xantphos, BINAP, and Chiraphos. All complexes were obtained in high yields and fully characterized, confirming bidentate coordination and preservation of the rigid palladacyclopentadienyl framework. Biological evaluation against cisplatin‐sensitive, cisplatin‐resistant, and high‐grade serous ovarian cancer cell lines revealed that complexes bearing DPPF and DPPBz exhibit sub‐micromolar cytotoxicity combined with marked selectivity for cancer cells over non‐tumoral fibroblasts, outperforming cisplatin and carboplatin. Notably, pronounced differences in activity were observed between enantiomeric BINAP‐ and Chiraphos‐based complexes, representing a rare example of strong chirality‐dependent cytotoxicity in metal‐based agents. Molecular docking analyses were used to rationalize the observed trends, correlating cytotoxicity with the number and nature of predicted non‐covalent interactions formed with DNA. These results highlight palladacyclopentadienyl–diphosphine complexes as a highly tunable platform for anticancer drug design and identify DPPF‐ and DPPBz‐based derivatives as promising lead compounds for further preclinical evaluation.
Design, Synthesis, Molecular Docking, Structure Activity Relationship, and In Vivo Evaluation of Pyrazole–Pyrimidines for Discovering New Nonsteroidal Anti-Inflammatory Drugs Paulo A. Moraes, Genilson S. Pereira, Mário A. Marangoni, João Pedro V. Lopes, Amanda Favarin, Adriano F. Camargo, Pablo A. Nogara, Helio G. Bonacorso, Marcos A. P. Martins, Sara M. Oliveira, Nilo Zanatta Chembiochem, 2026 Nonsteroidal anti‐inflammatory drugs are among the most prescribed worldwide to treat pain, fever, and inflammation. However, they can cause severe adverse effects such as gastric, duodenal, hepatic, and renal injuries. Thus, the search for effective and new drugs is of high priority. Herein, the synthesis of a new series 4‐((5‐substituted‐3‐(trifluoromethyl)‐1 H ‐pyrazol‐1‐yl)methyl)‐6‐(trifluoromethyl) pyrimidin‐2‐substituted (pyrazole–pyrimidines) obtained through the cyclocondensation reaction of pyrazole–enaminones with amidines under mild conditions is reported. The chemical structures are confirmed by 1 H and 13 C NMR, mass spectrometry, and single‐crystal X‐ray analysis for compounds 4c and 4g . Molecular docking studies are conducted to identify selective cyclooxygenase‐2 (COX‐2) inhibitors, revealing that compounds 4d , 4j , and 4k display higher binding affinity. ADMET predictions (absorption, distribution, metabolism, excretion, and toxicity) corroborate to the docking results, suggesting favorable pharmacokinetic and toxicological properties. The in vivo antinociceptive activity is investigated in mice using the capsaicin‐induced nociception model. Oral administration of compounds 4d , 4e , 4f , 4j , and 4k significantly reduces nociceptive responses, achieving effects comparable or superior to celecoxib, without altering locomotor activity. Altogether, the findings demonstrate that pyrazole–pyrimidine derivatives, especially 4d and 4k , are promising candidates for the development of selective COX‐2 analgesics, combining antinociceptive efficacy with a favorable toxicological profile.
Influence of the charge of 1,3,5-triaza-7-phosphaadamantane-based ligands on the anticancer activity of organopalladium complexes Tommaso Lorenzon, Maria Vescovo, Michele Maiullari, Giovanni Tonon, Nuno Reis Conceição, Sónia A. C. Carabineiro, Abdallah G. Mahmoud, Martin C. Dietl, Nicola Demitri, Laura Orian, Pablo A. Nogara, Isabella Caligiuri, Flavio Rizzolio, A. Stephen K. Hashmi, Fabiano Visentin, Thomas Scattolin Rsc Advances, 2025 Novel organopalladium complexes bearing PTA-based ligands were synthesized in this article, showing excellent and, in some cases, selective antitumor activity.
In Silico and In Vitro Studies of the Approved Antibiotic Ceftaroline Fosamil and Its Metabolites as Inhibitors of SARS-CoV-2 Replication Cássia Delgado, Pablo Andrei Nogara, Milene Dias Miranda, Alice Santos Rosa, Vivian Neuza Santos Ferreira, Luisa Tozatto Batista, Thamara Kelcya Fonseca Oliveira, Folorunsho Bright Omage, Flávia Motta, Izabela Marques Bastos, Laura Orian, João Batista Teixeira Rocha Viruses, 2025 The SARS-CoV-2 proteases Mpro and PLpro are critical targets for antiviral drug development for the treatment of COVID-19. The 1,2,4-thiadiazole functional group is an inhibitor of cysteine proteases, such as papain and cathepsins. This chemical moiety is also present in ceftaroline fosamil (CF), an FDA-approved fifth-generation cephalosporin antibiotic. This study investigates the interactions between CF, its primary metabolites (M1 is dephosphorylated CF and M2 is an opened β-lactam ring) and derivatives (protonated M1H and M2H), and its open 1,2,4-thiadiazole rings derivatives (open-M1H and open-M2H) with SARS-CoV-2 proteases and evaluates CF’s effects on in vitro viral replication. In silico analyses (molecular docking and molecular dynamics (MD) simulations) demonstrated that CF and its metabolites are potential inhibitors of PLpro and Mpro. Docking analysis indicated that the majority of the ligands were more stable with Mpro than PLpro; however, in vitro biochemical analysis indicated PLpro as the preferred target for CF. CF inhibited viral replication in the human Calu-3 cell model at submicromolar concentrations when added to cell culture medium at 12 h. Our results suggest that CF should be evaluated as a potential repurposing agent for COVID-19, considering not only viral proteases but also other viral targets and relevant cellular pathways. Additionally, the reactivity of sulfur in the 1,2,4-thiadiazole moiety warrants further exploration for the development of viral protease inhibitors.
Assessment of Neurotoxic Effects of Oxycodone and Naloxone in SH-SY5Y Cell Line Luíza Siqueira Lima, Nayara de Souza da Costa, Maria Eduarda Andrade Galiciolli, Meire Ellen Pereira, William Almeida, Marta Margarete Cestari, Pablo Andrei Nogara, Ana Carolina Irioda, Cláudia Sirlene Oliveira International Journal of Molecular Sciences, 2023
Selenium Neuroprotection in Neurodegenerative Disorders Cláudia Sirlene Oliveira, Bruna Candia Piccoli, Pablo Andrei Nogara, Meire Ellen Pereira, Katherine Athayde Teixeira de Carvalho, Anatoly V. Skalny, Alexey A. Tinkov, Michael Aschner, João Batista Teixeira Rocha Handbook of Neurotoxicity Second Edition, 2023
Neurodevelopmental Effects of Mercury Cláudia Sirlene Oliveira, Pablo A. Nogara, Daniel Mendes Pereira Ardisson-Araújo, Michael Aschner, João Batista Teixeira da Rocha, et al. Advances in Neurotoxicology, 2018
Toxicology and anticancer activity of synthetic organoselenium compounds Organoselenium Compounds in Biology and Medicine Synthesis Biological and Therapeutic Treatments, 2017
Pteridophytes: Ethnobotany and pharmacologic bioactivities Natural Products Structure Bioactivity and Applications, 2012
Cytotoxic and tripanocide activities of pityrogramma calomelanos (L.) link Teogenes M. de Souza, Maria F. B. M. Braga, Rogério A. Saraiva, Pablo A. Nogara, Diones C. Bueno, Aline A. Boligon, Margareth L. A. Fone, João B. T. da Rocha, Miriam Rolon, Celeste Vega, Antonieta Rojas de Arias, Jose G. M. Costa, Irwin R. Alencar de Menezes, Henrique D. M. Coutinho, Antônio A. F. Saraiva American Fern Journal, 2012
RECENT SCHOLAR PUBLICATIONS
Selenoneine, a food chain component with potential neuroprotective effects against electrophilic mercury forms GS Rieder, D Zeppilli, PA Nogara, M Aschner, AA Tinkov, IA Adedara, ... Advances in Neurotoxicology , 2026 2026
Stereochemical Modulation of Palladacyclopentadienyl Complexes Bearing Diphosphine Ligands: A Key to Enhanced DNA Interaction and Anticancer Activity S Mautone, M Scianna, I Caligiuri, L Orian, P Nogara, N Demitri, ... European Journal of Inorganic Chemistry, e70192 , 2026 2026
3-(Difluoromethyl)-7-(trifluoromethyl) pyrazolo [1, 5-a] pyrimidines achieved by sequential formylation/difluorination reactions: Synthesis, optical properties, BSA bio … JN Araújo, FS Stefanello, ÉOT Machado, FM Luz, F Gritzenco, PA Nogara, ... Journal of Photochemistry and Photobiology A: Chemistry, 117024 , 2026 2026 Citations: 1
Construction of a three-dimensional glucagon model as a didactic tool in an undergraduate course BV Barbosac, BT João, A Segattoc Revista Electrónica de Enseñanza de las Ciencias 25 (1), 135-150 , 2026 2026
Design, Synthesis, Molecular Docking, Structure Activity Relationship, and In Vivo Evaluation of Pyrazole–Pyrimidines for Discovering New Nonsteroidal Anti‐Inflammatory Drugs PA Moraes, GS Pereira, MA Marangoni, JPV Lopes, A Favarin, ... ChemBioChem 27 (1), e202500688 , 2026 2026
Molecular Aspects of Methylcadmium Toxicity: Effects on the H 2 O 2 Reduction by Cysteine and Selenocysteine Disclosed In Silico A Rubbi, F Lambertini, PA Nogara, M Bortoli, JBT Rocha, L Orian Chemical Research in Toxicology 39 (1), 144-156 , 2025 2025 Citations: 1
Exploring the anticancer properties of indenyl and allyl palladates through their interaction with nucleic acids T Giani, G Tomasi, PA Nogara, L Orian, F Visentin, T Scattolin, T Biver Journal of Inorganic Biochemistry 271, 112978 , 2025 2025 Citations: 1
In Silico and in vitro studies of the approved antibiotic Ceftaroline fosamil and its metabolites as inhibitors of SARS-CoV-2 replication C Delgado, PA Nogara, MD Miranda, AS Rosa, VNS Ferreira, LT Batista, ... Viruses 17 (4), 491 , 2025 2025 Citations: 1
Influence of the charge of 1, 3, 5-triaza-7-phosphaadamantane-based ligands on the anticancer activity of organopalladium complexes T Lorenzon, M Vescovo, M Maiullari, G Tonon, NR Conceição, ... RSC advances 15 (18), 14058-14071 , 2025 2025 Citations: 4
Aprendizagem significativa e avaliação formativa via quatro abordagens de ensino: revisão de literatura M Ferreira, SN Ribas, ALS da Silva, PA Nogara, ... Ensino de Ciências e Tecnologia em Revista–ENCITEC 14 (3), 181-202 , 2024 2024 Citations: 4
50 years of organoselenium chemistry, biochemistry and reactivity: Mechanistic understanding, successful and controversial stories A Madabeni, M Bortoli, PA Nogara, G Ribaudo, M Dalla Tiezza, L Flohé, ... Chemistry–A European Journal 30 (70), e202403003 , 2024 2024 Citations: 50
Nas ondas do rap: surfar na arte de narrar AL da Silva Editora Appris , 2024 2024 Citations: 2
Toxicology of Essential and Xenobiotic Metals JBT Da Rocha, M Aschner, PA Nogara CRC Press , 2024 2024 Citations: 9
Gold Structure, Reactivity, Biological Activities, and Toxicity PA Nogara, FB Omage, CS Schiavon, KF Nogara, WC da Rosa, ... Toxicology of Essential and Xenobiotic Metals, 226-248 , 2024 2024
The Importance of Rabenstein's Reaction in the Toxicity of Methylmercury: What is Missing? JBT Rocha, M Farina, PA Nogara, M Aschner Toxicology of Essential and Xenobiotic Metals, 203-225 , 2024 2024 Citations: 2
Reactivity of zinc fingers in oxidizing environments: insight from molecular models through activation strain analysis D Zeppilli, A Madabeni, PA Nogara, JBT Rocha, L Orian ChemPlusChem 89 (9), e202400252 , 2024 2024 Citations: 3
Interplay between diphenyl diselenide and copper: Impact on D. melanogaster survival, behavior, and biochemical parameters GS Rieder, T Duarte, CP Delgado, A Rodighiero, PA Nogara, L Orian, ... Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology … , 2024 2024 Citations: 8
Atividade Experimental Problematizada (AEP): 60 Experimentações com Foco no Ensino de Química: Da Educação Básica à Universidade ALS da Silva, PA Nogara Editora Appris , 2024 2024 Citations: 11
Representation of insulin synthesis and construction of a three-dimensional insulin model as didactic tools in basic education GL Schmitz, LE Joras, PA Nogara, MEA Galiciolli, BC Piccoli, ... Journal of Biological Education 58 (2), 344-354 , 2024 2024 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Organoselenium compounds as mimics of selenoproteins and thiol modifier agents NV Barbosa, CW Nogueira, PA Nogara, AF de Bem, M Aschner, ... Metallomics 9 (12), 1703-1734 , 2017 2017 Citations: 177
Methylmercury's chemistry: From the environment to the mammalian brain PA Nogara, CS Oliveira, GL Schmitz, PC Piquini, M Farina, M Aschner, ... Biochimica et Biophysica Acta (BBA)-General Subjects 1863 (12), 129284 , 2019 2019 Citations: 140
Virtual screening of acetylcholinesterase inhibitors using the Lipinski’s rule of five and ZINC databank PA Nogara, RA Saraiva, D Caeran Bueno, LJ Lissner, C Lenz Dalla Corte, ... BioMed research international 2015 (1), 870389 , 2015 2015 Citations: 96
Neurodevelopmental effects of mercury CS Oliveira, PA Nogara, DMP Ardisson-Araújo, M Aschner, JBT Rocha, ... Advances in neurotoxicology 2, 27-86 , 2018 2018 Citations: 63
50 years of organoselenium chemistry, biochemistry and reactivity: Mechanistic understanding, successful and controversial stories A Madabeni, M Bortoli, PA Nogara, G Ribaudo, M Dalla Tiezza, L Flohé, ... Chemistry–A European Journal 30 (70), e202403003 , 2024 2024 Citations: 50
In silico Studies on the Interaction between Mpro and PLpro From SARS‐CoV‐2 and Ebselen, its Metabolites and Derivatives PA Nogara, FB Omage, GR Bolzan, CP Delgado, M Aschner, L Orian, ... Molecular Informatics 40 (8), 2100028 , 2021 2021 Citations: 46
Effect of methylmercury binding on the peroxide-reducing potential of cysteine and selenocysteine A Madabeni, PA Nogara, M Bortoli, JBT Rocha, L Orian Inorganic Chemistry 60 (7), 4646-4656 , 2021 2021 Citations: 39
Thimerosal inhibits Drosophila melanogaster tyrosine hydroxylase ( Dm TyrH) leading to changes in dopamine levels and impaired motor behavior: implications for … MC Bianchini, COA Gularte, PA Nogara, BN Krum, MC Gayer, JC Bridi, ... Metallomics 11 (2), 362-374 , 2019 2019 Citations: 38
Toxic metals that interact with thiol groups and alteration in insect behavior CS Oliveira, PA Nogara, LS Lima, MEA Galiciolli, JV Souza, M Aschner, ... Current Opinion in Insect Science 52, 100923 , 2022 2022 Citations: 34
Mercury in our food PA Nogara, M Farina, M Aschner, JBT Rocha Chemical Research in Toxicology 32 (8), 1459-1461 , 2019 2019 Citations: 34
Molecular docking, and anti-biofilm activity of gold-complexed sulfonamides on Pseudomonas aeruginosa CR Mizdal, ST Stefanello, PA Nogara, FAA Soares, ... Microbial pathogenesis 125, 393-400 , 2018 2018 Citations: 30
Diselenoamino acid derivatives as GPx mimics and as substrates of TrxR: in vitro and in silico studies JH Sudati, PA Nogara, RA Saraiva, C Wagner, EE Alberto, AL Braga, ... Organic & Biomolecular Chemistry 16 (20), 3777-3787 , 2018 2018 Citations: 30
Diphenyl Diselenide and SARS-CoV-2: in silico Exploration of the Mechanisms of Inhibition of Main Protease (M pro ) and Papain-like Protease (PL pro ) FB Omage, A Madabeni, AR Tucci, PA Nogara, M Bortoli, AS Rosa, ... Journal of Chemical Information and Modeling 63 (7), 2226-2239 , 2023 2023 Citations: 27
Mechanistic Insight into SARS-CoV-2 M pro Inhibition by Organoselenides: The Ebselen Case Study A Madabeni, PA Nogara, FB Omage, JBT Rocha, L Orian Applied Sciences 11 (14), 6291 , 2021 2021 Citations: 26
Chalcogen–mercury bond formation and disruption in model Rabenstein's reactions: A computational analysis A Madabeni, M Dalla Tiezza, FB Omage, PA Nogara, M Bortoli, ... Journal of Computational Chemistry 41 (23), 2045-2054 , 2020 2020 Citations: 26
Novel aryl (heteroaryl)-substituted (pyrimidyl) benzamide-based BF2 complexes: Synthesis, photophysical properties, BSA-binding, and molecular docking analysis HG Bonacorso, TP Calheiro, TV Acunha, BA Iglesias, SZ Franceschini, ... Dyes and Pigments 161, 396-402 , 2019 2019 Citations: 26
New 1-(Spiro [chroman-2, 1′-cycloalkan]-4-yl)-1H-1, 2, 3-Triazoles: Synthesis, QTAIM/MEP analyses, and DNA/HSA-binding assays FS Stefanello, YG Kappenberg, A Ketzer, SZ Franceschini, PRS Salbego, ... Journal of Molecular Liquids 324, 114729 , 2021 2021 Citations: 25
High level of methylmercury exposure causes persisted toxicity in Nauphoeta cinerea BC Piccoli, JC Alvim, FD Da Silva, PA Nogara, OC Olagoke, M Aschner, ... Environmental Science and Pollution Research 27 (5), 4799-4813 , 2020 2020 Citations: 25
Glycoconjugates based on Supramolecular Troger’s base Scaffold: synthesis, Photophysics, docking, and BSA association study DMP Aroche, JP Vargas, PA Nogara, F da Silveira Santos, JBT da Rocha, ... ACS omega 4 (8), 13509-13519 , 2019 2019 Citations: 23
1, 1-Difluoro-3-aryl (heteroaryl)-1 H-pyrido [1, 2-c][1, 3, 5, 2] oxadiazaborinin-9-ium-1-uides: synthesis; structure; and photophysical, electrochemical, and BSA-binding studies HG Bonacorso, TP Calheiro, BA Iglesias, TV Acunha, SZ Franceschini, ... New Journal of Chemistry 42 (3), 1913-1920 , 2018 2018 Citations: 22